Apparatus for cooling hot material in bulk

ABSTRACT

Apparatus for continuous cooling of iron sinter and other hot material in bulk comprising a base part, at least two annular troughs supported on the base part for rotary motion about a vertical axis, said troughs being superimposed one above the other, each trough being open at the top and bottom to permit of introduction and flow through of material be discharge from the bottom thereof, and having a downwardly tapering section, means for introduction of material into the upper trough from which it passes into the lower trough to discharge therefrom and means for injecting cooling medium into the bed of material in each trough.

United States Patent Lorrek et al.

541 APPARATUS FOR COOLING nor MATERIAL IN BULK I [72] Inventors:Johannes Lorrek, Murb (Ruhr);

Josef Lorrek, Essen, both of Germany [73] Assignee: Head Wrightson andCompany Limited, Yarm, Yorkshire, England.

[22] Filed: Dec. 21, 1970 [21] Appl. No.: 99,960

301 Foreign Application Priority om Dec. 20, 1969 Germany ..P 19 63936.2

Feb. 10,1970 Germany ..P=2o 05 928.3

[52] US. Cl. ..266/20, 75/90, 34/173 [51] Int. Cl ..F27b 21/00 [58]Field of Search 266/20, 21; 34/62, 173;

[56] References Cited UNITED STATES PATENTS 8/1949 Baughmanmi ..34/l738/1949 Greyson- ..Z66/21X [451 Dec. 26, 1972 3,175,302 3/1965 Retali etal. I .34/173 X y 2,822,078 2/1958 Haven ..198/209 7 FOREIGN PATENTS ORAPPLICATIONS 643,324 6/1962 Canada ..266/20 1,167,536 4/1964 Germany....266/20 698,014 10/1953 GreatBritain "1266/21 Primary Examiner-R.Spencer Annear Attorney-Baldwin, Wight & Brown [57] 7, ABSTRACTApparatus for continuous cooling of iron sinter'and other hot materialin bulk comprising a base part, at

least two annular troughs supported on the base part for rotary motionabout a vertical axis, said troughs being superimposed one above theother, each trough being open at the top and bottom to permit ofintroduction and flow through of material be discharge from the bottomthereofiand having a downwardly tapering section, means for introductionof material into the upper trough from which it passes into the lowertrough to discharge therefrom and means for injecting cooling mediuminto the bed of material in each trough.

4 Claims, 1 Drawing Figure APPARATUS FOR COOLING nor MATERIAL IN BULKThe invention relates to apparatus for the cooling of hot material inbulk and in particular of iron ore sinter with reference to which it ishereinafter described in detail. Continuously revolving or circulatingsinter coolers are known in which the hot sinter from a sinter belt isdeposited on an endless slat type conveyor moving on a circular track,or on a tub railway or the like, where it is cooled by air-drawn orblown through the material. Sinter coolers of this type are on the wholefairly satisfactory but their performance is limited to the extent ofthe floor area available.

This invention is concerned with providing apparatus for cooling of hotbulk material, in particular iron ore sinter, capable of handling arelatively large quantity of sinter to be cooled for a given floor area.This is of particular importance where the'overall diameter of thecooling installation of a sinter plant must be kept to a minimum becauseonly a limited space is available.

Apparatus according to the invention comprises two or more troughsarranged one above the other and mounted to revolve about a verticalaxis, means being provided for continuously feeding material into theupper trough and for withdrawing it from the lower trough and in whichslots or openings are provided in the inner wall or walls of the troughsfor introduction of cooling air or gas.

In a preferred embodiment of the invention the apparatus comprises acentral structure or framework supporting a series of annularsuperimposed troughs, each trough having a downwardly taperedcross-section and being open at the top and bottom so as to permit ofgravity flow from one trough to the other.

In the inner side wall of each of the troughs is a louvre or a number ofelongated, circumferentially spaced slots for admission of cooling airfrom a central chamber in the structure.

An embodiment of the cooling device according to the invention isillustrated in the accompanying drawmg.

The cooling installation of this invention is generally indicated at land is built up of a truncated conical wall portion 7 supported by aframework structure 17 connecting an upper beam 18 and a lower platform19 having an inbuilt bearing housing 20 by which it is journalled torevolve about a vertical shaft 2. A ground support for the platform isprovided by circumferentially spaced sets of wheels 3, at least one ofwhich is driven by a drive transmission from motor 4, in engagement withtracks 23 on the underside of platform 19.

Material to be cooled is accommodated in a chamber provided by twoannular troughs and 6, arranged one above the other. In the presentembodiment the troughs are formed by an inclined internal wall 7 andouter wall plates 8 and 9.

Wall plates 8 and 9, which may be supported from the internal wall 7 inany conventional manner such as by brackets 24, as shown, for example,in US. Pat. No. 2,822,078, granted Feb. 4, 1958, are inclined in adirection opposite to wall 7 so as to enclose a chamber having acrosssection in the form of an inverted cone. The troughs, which are open atthe top and at the bottom, are vertically spaced so that the lowertrough always remains substantially completely filled by the materialrunning out of the upper one, due to the resulting angle of repose ofthe material, without the material being able to flow over the upperedge of the side wall 9 of the lower trough 6 (or troughs when more thantwo are provided).

The material to be cooled is continuously supplied from a chute 10,whence it passes into the uppermost of the two troughs 5 and 6 and isfinally dischargedby one or several conventional stripper blades 25which project into the bed on the bottom plate 11 below the bottom oftrough 6 whence it is transferred to a conventional conveyor belt 26 orthe like as disclosed, for example, in German Pat. No. 1,167,536 gratedApril 9, 1964.

Cooling air is introduced through a duct 12 terminating in a hood, whoselower end is joined to the closed inner space or chamber 13 by a wateror other seal 15. From chamber 13 it passes directly into the troughs 5and 6 through apertures in the wall 7, bounded by plates 14 arranged aslouvres so it flows in an upwards direction through the troughs 5 and 6,opposite to that of the material, finally escaping throughthe materialat its surface.

Although only a preferred embodiment of the cooling apparatus has beenspecifically. illustrated and described in this application, it is to beunderstood that minor variations may be made in the structural detailsof the cooling apparatus and the arrangement of the troughs thereofwithout departing from the spirit and scope of the invention, as definedby the appended claims.

We claim:

1. Apparatus for continuous cooling of iron ore sinter and other hotmaterial in bulk comprising a base part, at least two annular troughssupported on the base part for rotary motion about a vertical axis, saidtroughs being directly superimposed one above the other in staggeredrelation and having a common inner wall plate and separate outer wallplates set at an angle to said inner wall plate so as to form separatecooling chambers each having a. downwardly tapering section, each troughbeing open at the top and bottom to permit of introduction andunobstructed flow therethrough of material by discharge from the bottomthereof, means for introduction of material into the upper trough fromwhich the material passes into the lower trough to discharge therefrom,and cooling means for injecting cooling medium into the bed of materialin each trough, said cooling means including louvres and slots in saidinner wall plate for each trough.

2;. Apparatus as claimed in claim 1, in which the inner wall bounds acentral chamber and means for connecting the chamber to a source ofcooling medium.

3. Apparatus for continuous cooling of iron ore sinter and other hotmaterial in bulk comprising a support structure mounted to revolve abouta vertical axis, at least two annular troughs carried by the supportstructure and arranged directly one above the other in staggeredrelation, said troughs having a common inner wall plate and outer wallplates set at an angle to said inner wall plate and forming separatecooling chambers each having a downwardly tapering transverse sectionwith each chamber having an opening at the top and bottom facilitatingintroduction and continuous passage of material to be cooledtherethrough as the troughs revolve, a platform on the support structureand extending peripherally therefrom being spaced from the lowermosttrough to receive cooled material therefrom, stripper means overlyingsaid platform and extending into the path of a bed of material on theplatform to remove material from said platform, and means forintroduction of coolingmedium through opening means in the inner wallplate into each trough.

4. Apparatus for cooling iron ore sinter and other hot material in bulkcomprising a turntable mounted to revolve about a vertical axis, asuperstructure on the table. supporting an inner wall in the form of atruncated cone, oppositely angled wall elements also on thesuperstructure and defining with said inner wall at least two directlysuperimposed troughs,-each trough having an opening at the top andbottom facilitating introduc-

1. Apparatus for continuous cooling of iron ore sinter and other hotmaterial in bulk comprising a base part, at least two annular troughssupported on the base part for rotary motion about a vertical axis, saidtroughs being directly superimposed one above the other in staggeredrelation and having a common inner wall plate and separate outer wallplates set at an angle to said inner wall plate so as to form separatecooling chambers each having a downwardly tapering section, each troughbeing open at the top and bottom to permit of introduction andunobstructed flow therethrough of material by discharge from the bottomthereof, means for introduction of material into the upper trough fromwhich the material passes into the lower trough to discharge therefrom,and cooling means for injecting cooling medium into the bed of materialin each trough, said cooling means including louvres and slots in saidinner wall plate for each trough.
 2. Apparatus as claimed in claim 1, inwhich the inner wall bounds a central chamber and means for connectingthe chamber to a source of cooling medium.
 3. Apparatus for continuouscooling of iron ore sinter and other hot material in bulk comprising asupport structure mounted to revolve about a vertical axis, at least twoannular troughs carried by the support structure and arranged directlyone above the other in staggered relation, said troughs having a commoninner wall plate and outer wall plates set at an angle to said innerwall plate and forming separate cooling chambers each having adownwardly tapering transverse section with each chamber having anopening at the top and bottom facilitating introduction and continuouspassage of material to be cooled therethrough as the troughs revolve, aplatform on the support structure and extending peripherally therefrombeing spaced from the lowermost trouGh to receive cooled materialtherefrom, stripper means overlying said platform and extending into thepath of a bed of material on the platform to remove material from saidplatform, and means for introduction of cooling medium through openingmeans in the inner wall plate into each trough.
 4. Apparatus for coolingiron ore sinter and other hot material in bulk comprising a turntablemounted to revolve about a vertical axis, a superstructure on the tablesupporting an inner wall in the form of a truncated cone, oppositelyangled wall elements also on the superstructure and defining with saidinner wall at least two directly superimposed troughs, each troughhaving an opening at the top and bottom facilitating introduction andcontinuous flow-through of material to be cooled, a central chamberenclosed within said inner wall and in communication with the interiorof the troughs through openings in the said inner wall, and means forsupply of cooling medium to said central chamber.